142609541 has 4 divisors (see below), whose sum is σ = 142715232. Its totient is φ = 142503852.

The previous prime is 142609531. The next prime is 142609561. The reversal of 142609541 is 145906241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145906241 = 13 ⋅11223557.

It is a cyclic number.

It is not a de Polignac number, because 142609541 - 2¹⁸ = 142347397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142609498 and 142609507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142609531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50795 + ... + 53528.

It is an arithmetic number, because the mean of its divisors is an integer number (35678808).

Almost surely, 2^142609541 is an apocalyptic number.

It is an amenable number.

142609541 is a deficient number, since it is larger than the sum of its proper divisors (105691).

142609541 is a wasteful number, since it uses less digits than its factorization.

142609541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105690.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 142609541 is about 11941.9236725077. The cubic root of 142609541 is about 522.4557669567.

The spelling of 142609541 in words is "one hundred forty-two million, six hundred nine thousand, five hundred forty-one".